7-Fluoro-1,2,3,4-tetrahydroisoquinoline is primarily used in pharmaceutical research and development as a key intermediate in the synthesis of various biologically active compounds. Its structure, which includes a tetrahydroisoquinoline core with a fluorine substituent, makes it valuable for designing molecules with potential therapeutic effects. It is often explored in the creation of drugs targeting neurological disorders, such as Parkinson's disease and depression, due to its ability to interact with neurotransmitter systems. Additionally, it is utilized in the development of compounds with potential anticancer properties, as the fluorine atom can enhance binding affinity and metabolic stability. Researchers also investigate its role in creating enzyme inhibitors and receptor modulators for treating other medical conditions.